If you're thinking about hunting antelope in CO., you'll have to remove the .22 calibers from the list as they don't meet the state requirement for minumum caliber for big game hunting.
I like the .243 and this year I shot my antelope with my .243 wssm. AR. One shot, BANG flop!
Put a bullet from your 300 Win. mag through the ribs and you won't loose any meat. Unless you're just looking for a reason for a new gun, the one you have now will work out to any distance that you can shoot accurately!
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A government big enough to give you everything you want, is big enough to take away everything you have.
Thomas Jefferson
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